BBC Chinese recently reported that officials from the Kremlin announced that Russia and India are about to reach a major agreement for India to obtain S-400 air defense missile systems. The S-400 is the most advanced air defense system Russia has. Russian President Vladimir Putin and Indian Prime Minister Narendra Modi are expected to sign the deal at the BRICS Leadership Summit held in India. Currently the S-400 air missile defense system is being deployed in Syria, where Russia is supporting the Assad government. The two countries are also planning to discuss wider topics, especially trade relations. More agreements may be signed in the future. During the Cold War, Russia and India used to be close allies. Since 2000, they have had routine annual leadership talks.
Source: BBC Chinese, October 14, 2016
http://www.bbc.com/zhongwen/simp/world/2016/10/161014_india_russia_missile